What is "monzogranite"

n. A kind of biotite granite rock, considered to be the final fractionation product of magma.

Monzogranites (MGr) are biotite granite rocks that are considered to be the final fractionation product of magma. Monzogranites are characteristically felsic (SiO > 73%, and FeO + MgO + TiO < 2.4), weakly peraluminous (AlO/ (CaO + NaO + KO) = 0.98–1.11), and contain ilmenite, sphene, apatite and zircon as accessory minerals. Although the compositional range of the monzogranites is small, it defines a differentiation trend that is essentially controlled by biotite and plagioclase fractionation. (Fagiono, 2002). Monzogranites can be divided into two groups (magnesio-potassic monzogranite and ferro-potassic monzogranite) and are further categorized into rock types based on their macroscopic characteristics, melt characteristics, specific features, available isotopic data, and the locality in which they are found.